Question

Use Mendeleev's periodic table to predict the formula for the oxide of the following elements: K,C, Al, Si, Ba?

Answer 1

The element K is in I group of Mendeleev's periodic table in which general formula is R2O. So formula of oxide of K is K2O
2.element C is in group IV of Mendeleev's periodic table .General formula of oxide is R2O so formula of oxide is CO2
3. Similarly oxide of Al is Al2O3.
4. Formula of Si oxide is SiO2.
5. oxide of Ba is BaO

Answer 2

1) K2O

2) CO2

3) Al2O3

4) SiO2

5) BaO